This concrete foundation detail shows a pipe trench passing through or below a concrete wall and footing with specified minimum clearances and pipe outer diameters. The front and side views indicate dimensions including six inches minimum clearance around pipes, eight inches minimum from trench edges, and two inches clearance between sleeves and pipes typically. Excavation is restricted below the indicated line, and the trench is backfilled with tamped sand and compacted backfill material.
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